Progression of Voice and Speech Impairment in the Course of Parkinson's Disease: A Longitudinal Study

<table>Average values of the perceptual speech scores and the intelligibility   score at baseline in female and male speakers at baseline (left column) and at followup (right column).</table>

Parkinson’s Disease

fig2

Figure 2

Figure 2: Progression of Voice and Speech Impairment in the Course of Parkinson's Disease: A Longitudinal Study 